# 循环里面还有循环
# 打印 5行6列的 *
# 外层循环负责多少行, 里层循环负责每一行执行的事情
# * * * * * *
# * * * * * *
# * * * * * *
# * * * * * *
# * * * * * *
i = 0
while i<5:j = 0while j<6:print("* ", end='')j+=1# 换行print()i+=1
print('--'*20)
# *
# * *
# * * *
# * * * *
# * * * * *
# * * * * * *
i = 0
while i<6:j = 0while j <= i:j += 1print("* ", end='')# 换行print()i+=1
print('--'*20)i = 1
while i<=9:j = 1while j<= i:print(f"{j} x {i} = {i*j}", end='\t')j+=1print()i+=1

for循环

# for 循环更常用
# for 临时变量 in 迭代对象:
#     循环体
# 字符串就是可迭代对象中的一种
# 1. 纯迭代
name = "哈哈xixixi"
# name = "12132132"
# name = 234213422
# for x in name:
#     print(x)
# 2.次数迭代
# range(end) 终止
# range(start, end)
# range(start, end, step) # step步长
sums = 0
for i in range(1, 101):sums += i
print(sums)# break 终止本层循环
# continue 终止本次循环, 执行下一次循环
# 累加和大于1000是终止并且输出sums = 0
for i in range(1, 101):if sums > 1000:breaksums += i
print(sums)
# 计算所有奇数累加和
sums = 0
for i in range(1, 101, 2):if i%2==0:continuesums += i
print(sums)

# 打印 5行6列的 *
# 外层循环负责多少行, 里层循环负责每一行执行的事情
# * * * * * *
# * * * * * *
# * * * * * *
# * * * * * *
# * * * * * *
for _ in range(5):for _ in range(6):print("* ", end='')print()
print('--'*20)
# *
# * *
# * * *
# * * * *
# * * * * *
# * * * * * *
# for i in range(5):
#     for _ in range(i+1):
#         print("* ", end="")
#     print()
for i in range(5):for j in range(1,i+2):print("* ", end="")print()
print('--'*20)
# 九九乘法表
for i in range(1,10):for j in range(1,i+1):print(f"{j} * {i} = {i * j}", end="\t")print()
from random import randint
computer = randint(1, 100)
count = int(input("请投币"))
for i in range(1,100):count -= 1num = int(input("请输入您猜的数字"))if num > computer:print("猜大了")elif num < computer:print("猜小了")else:print("猜对了")breakif count == 0:print("用光了，去买币吧")break

函数

# 函数 : 将重复的代码进行封装的一种结构, 避免代码冗余
# 定义函数语法:
# def 函数名(形式参数1, 形式参数2, 形式参数3....参数n):
#     函数体
from random import randint
## 分类
# 无参无返回
def hello():print("Hello")
# 调用函数
#函数名(实际参数1...)
hello()
# 有参无返回
def calSum(n):sums = 0for i in range(1, n+1):sums += iprint(sums)
calSum(10)
calSum(100)
print(calSum(1000)) # None
# 无参有返回
def f():return "Eric"# print("Eric")
name = f()
print(name + "Lee")## 编写一个函数实现 两个数相加
def add(x, y):print(x + y)
# 将相加的后的结果 扩大100倍
add(10, 20)